Install and update NuGet with PowerShell
IF (-NOT (Test-Path ".nuget\nuget.exe"))
{
Write-Verbose "Install NuGet"
New-Item -ItemType Directory ".nuget" | Out-Null
Invoke-WebRequest "https://www.nuget.org/nuget.exe" -OutFile ".nuget\nuget.exe" -UseBasicParsing
}
Write-Verbose "Update NuGet"
& ".\.nuget\nuget.exe" update -self